The very unpopular President Donald Trump is undergoing an investigation over campaign ties to Russia and a number of ethical questions about his ties to the family business – which could cause the GOP party to dump him.

According to The New Yorker, several of Trump’s critics are looking for ways to impeach the president, including the invocation of the 25th Amendment, which is the replacement of a president if he is deemed mentally unfit, which many lawmakers and experts think.

There are currently four congressional committees and the FBI investigating possible collusion between the Russian government and Trump’s associates.

“You can’t govern this country with a forty-per-cent approval rate — you just can’t,” said Stephen Moore, who is a senior economist at the Heritage Foundation and also worked as a Trump campaign adviser. “Nobody in either party is going to bend over backwards for Trump if over half the country doesn’t approve of him. That, to me, should be a big warning sign.”

A federal lawsuit has been filed against Trump for violating the Constitution’s emoluments clause for keeping ownership of his golf courses, hotels and other real estate developments. He has also faced backlash for hiring his daughter, Ivanka Trump, and son-in-law, Jared Kushner, as senior advisors.

“The reality is, he is governing as if he is the president of a Third World country,” said Jerry Taylor, president of the libertarian Niskanen Center. “Power is held by family and incompetent loyalists whose main calling card is the fact that Donald Trump can trust them, not whether they have any expertise.”

Sen. Mark Warner, a leading Democrat on the Senate Intelligence Committee, suggested to close friends that he thinks there is a 2-to-1 odds that the president will be impeached before his term ends.

“My guess is that there’s only between 50 and 100 Republican members of the House that are truly enthusiastic about Donald Trump as president,” said Taylor, head of the libertarian think tank. “The balance sees him as somewhere between a deep and dangerous embarrassment and a threat to the Constitution.”